May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
May Lunchtime 2020 Division 2
Weird Walk, Lost Weekends
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
July Challenge 2020 Division 2
Chef and Strings, Chef and Card Game, Doctor Chef, Chefina and Swaps, Ada King, Missing a Point
June Lunchtime 2020 Division 2
Chef and Demonetisation, Increasing Decreasing
January Challenge 2021 Division 2
Watching CPL, Fair Elections
February Challenge 2021 Division 2
Prime Game, Maximise Function, Team Name, Frog Sort
March Challenge 2021 Division 2
Interesting XOR!, Space Arrays
April Challenge 2021 Division 3
Worthy Matrix, Chef and Dice, Valid Pair, World Record, Strong Language
